/*
* File: CFdEventPoll.h
* Copyright (c) 2010. Silviu Caragea <silviu@intelliproject.net>
* Created on September 15, 2010, 12:34 AM
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*  1.Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
*  2.Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*  3.All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*       This product includes software developed by the University of
*       California, Berkeley and its contributors.
*  4.Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#ifndef CFDEVENTPOLL_H
#define	CFDEVENTPOLL_H

#include "../IFdEventInterface.h"

#ifdef USE_POLL

/*poll: MacOS 10.3.x has poll.h under /usr/include/, all other OS under /usr/include/sys/ */

#ifdef HAVE_POLL_H
    #include <poll.h>
#else
    #include <sys/poll.h>
#endif

/*   
    http://linux.die.net/man/3/poll
*/

namespace litevent
{


const struct EventMothodSignature sigPoll =
{
    "poll",
    EnumEventHandlerTypePoll
};

#define BUFFER_INT_SIZE 16

class CFdEventPoll : public IFdEventInterface
{
public:
    explicit CFdEventPoll(size_t maxfds);
     ~CFdEventPoll();
    
protected:
    int poll(int timeoutMs);
    int getEventRevent(size_t node);
    int getEventFileDescriptor(size_t node);
    int getEventNextFileDescriptor(int node);
    int setEvent(int fd_node , int fd, int events);
    int deleteEvent(int fd_node, int fd );
    
private:

    struct bufferInt
    {
        int *ptr;
        size_t used;
        size_t size;
    };

    struct pollfd *pollfds;
    size_t size;
    size_t used;
    struct bufferInt unused;

    DISALLOW_IMPLICIT_CONSTRUCTORS(CFdEventPoll);
};

inline CFdEventPoll::CFdEventPoll(size_t maxfds):IFdEventInterface(maxfds)
{
    memset(&unused, 0, sizeof(unused));
    size = 0;
    used = 0;
    pollfds = NULL;
};

inline CFdEventPoll::~CFdEventPoll()
{
    if(this->pollfds)
        free(this->pollfds);

    if (this->unused.ptr)
        free(this->unused.ptr);
}

}

#endif

#endif	/* CFDEVENTPOLL_H */

